I've had a recurring evap large leak code on my 2013 Impala with the 3.6 LFX engine. I changed the gas cap and replaced the purge valve under the hood, but this didn't fix it. The next step was to try changing the vent valve/vapor canister assembly at the fuel tank. After replacing the canister assembly I took the old one apart out of curiosity. While I'm not entirely sure how these canisters work, I thought they were supposed to contain activated charcoal. Instead, I found grey dust that spilled out of the canister and no charcoal pellets at all:
I didn't open the new one out of fear of damaging any gaskets or seals it may have on the cover, so I can't compare how it is supposed to look. Doesn't charcoal go in the bottom of that canister around the sides?
I will find out soon if this fixes the evap codes.
I didn't open the new one out of fear of damaging any gaskets or seals it may have on the cover, so I can't compare how it is supposed to look. Doesn't charcoal go in the bottom of that canister around the sides?
I will find out soon if this fixes the evap codes.